In the Many-Worlds Interpretation, the amplitude of the wave function is seen as describing the “measure of existence”. We can tell the existence measure of potential future Everett branches, but can we, even in principle, know the measure of existence for counterfactual branches? E.g. the measure of existence of an Everett branch where WW2 never happened?
[Question] Can we, in principle, know the measure of counterfactual quantum branches?
In the Many-Worlds Interpretation, the amplitude of the wave function is seen as describing the “measure of existence”. We can tell the existence measure of potential future Everett branches, but can we, even in principle, know the measure of existence for counterfactual branches? E.g. the measure of existence of an Everett branch where WW2 never happened?